66 lines
1.7 KiB
Text
66 lines
1.7 KiB
Text
/-
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Copyright (c) 2018 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Sebastian Ullrich
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Message Type used by the Lean frontend
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-/
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prelude
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import init.data.tostring init.lean.position
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namespace Lean
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inductive MessageSeverity
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| information | warning | error
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-- TODO: structured messages
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structure Message :=
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(filename : String)
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(pos : Position)
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(endPos : Option Position := none)
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(severity : MessageSeverity := MessageSeverity.error)
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(caption : String := "")
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(text : String)
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namespace Message
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protected def toString (msg : Message) : String :=
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msg.filename ++ ":" ++ toString msg.pos.line ++ ":" ++ toString msg.pos.column ++ ": " ++
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(match msg.severity with
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| MessageSeverity.information := ""
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| MessageSeverity.warning := "warning: "
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| MessageSeverity.error := "error: ") ++
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(if msg.caption = "" then "" else msg.caption ++ ":\n") ++
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msg.text
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instance : Inhabited Message :=
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⟨{ filename := "", pos := ⟨0, 1⟩, text := ""}⟩
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instance : HasToString Message :=
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⟨Message.toString⟩
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end Message
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structure MessageLog :=
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-- messages are stored in reverse for efficient append
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(revList : List Message)
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namespace MessageLog
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def empty : MessageLog :=
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⟨[]⟩
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def add (msg : Message) (log : MessageLog) : MessageLog :=
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⟨msg :: log.revList⟩
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protected def append (l₁ l₂ : MessageLog) : MessageLog :=
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⟨l₂.revList ++ l₁.revList⟩
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instance : HasAppend MessageLog :=
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⟨MessageLog.append⟩
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def hasErrors (log : MessageLog) : Bool :=
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log.revList.any $ λ m, match m.severity with
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| MessageSeverity.error := true
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| _ := false
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def toList (log : MessageLog) : List Message :=
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log.revList.reverse
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end MessageLog
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end Lean
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